Nippon tube industries offers neat flow copper tubes for application in areas like: refrigeration, air conditioning, plumbing engineering application, transportation, electrical conductors and bus bars, etc. Characteristics: a commercially pure copper that has been deoxidised with phosphorus in such a manner as to leave a high residual phosphorous content which is not readily susceptible to hydrogen embrittlement. It has good thermal conductivity. Etp refers to electrolytic tough pitch copper without any elements [other than oxygen] present in significant amount. It is suitable for soldering and brazing but oxyacetylene welding is not recommended for it.